1981

5.2

2002

6.0

2014

5.8

2002

5.3

1984

6.9

2009

0.0

2010

7.4

1994

1.0

1992

2.2

2019

7.0

2013

0.0

2013

6.0

1994

7.0

2009

7.3

1999

5.9

1970

6.1

1999

5.5